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todd · 01-07-2009, 04:53 PM

I've been struggling with a strange PC problem this week. I upgraded my CPU and motherboard to a Q9550 on a MSI P45-8D. I'm running 4 gigs of G.SKILL DDR2-800 RAM, an EVGA GeForce 8800 GT, and am using a BFG 650W PSU.

When I press the power button, the case lights come on and fans begin to spin, but everything powers down instantly. It is on for less than 1 second, without time to reach POST or see anything on the screen. After that, there is no response from the power button until PSU is switched off.

The weird part is that I have occasionally (about 1/8th of the time) gotten it to start up normally. Once it ran for a a few hours while I formatted a hard drive and installed Windows. As soon as I shut it down, though, it doesn't want to start back up.

I tested the PSU and GPU on different (less powerful) system and it worked flawlessly. Could it just be too weak/cheap to power this new motherboad and quad core processor?

Does this sound like it could be a bad motherboad or CPU? Afterall, they are the only two new parts in the whole system. My only option would be to RMA both of them as I have no way of testing each separately, so I'm trying to save that as a last ditch effort

Thanks, guys

01-07-2009, 04:53 PM	#1 (permalink)
todd Addict Location: Chicago	Power Supply Shuts Down Immediately I've been struggling with a strange PC problem this week. I upgraded my CPU and motherboard to a Q9550 on a MSI P45-8D. I'm running 4 gigs of G.SKILL DDR2-800 RAM, an EVGA GeForce 8800 GT, and am using a BFG 650W PSU. When I press the power button, the case lights come on and fans begin to spin, but everything powers down instantly. It is on for less than 1 second, without time to reach POST or see anything on the screen. After that, there is no response from the power button until PSU is switched off. The weird part is that I have occasionally (about 1/8th of the time) gotten it to start up normally. Once it ran for a a few hours while I formatted a hard drive and installed Windows. As soon as I shut it down, though, it doesn't want to start back up. I tested the PSU and GPU on different (less powerful) system and it worked flawlessly. Could it just be too weak/cheap to power this new motherboad and quad core processor? Does this sound like it could be a bad motherboad or CPU? Afterall, they are the only two new parts in the whole system. My only option would be to RMA both of them as I have no way of testing each separately, so I'm trying to save that as a last ditch effort Thanks, guys Last edited by todd; 01-07-2009 at 04:55 PM..